#!/usr/bin/env python

# Copyright (c) 2009, Purdue University
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"""This script is used for importing zone files into the database."""

__copyright__ = 'Copyright (C) 2009, Purdue University'
__license__ = 'BSD'
__version__ = '0.18'


import getpass
import os
import sys
from optparse import OptionParser

from roster_config_manager import zone_importer_lib
from roster_core import errors
from roster_core import constants


def main(args):
  usage = ('\n'
           '\n'
           'To import zone files:\n'
           '\t%s -c <config-file> -z <zone-view> -v <records-view>\n'
           '\t(-d <directory> | -f <file>) [-u <username>]\n' % (
               sys.argv[0]))

  parser = OptionParser(version='%%prog (Roster %s)' % __version__, usage=usage)

  parser.add_option('-c', '--config-file', action='store', dest='config',
                    help='Database config file.', metavar='<config-file>',
                    default=constants.SERVER_CONFIG_FILE_LOCATION)
  parser.add_option('-d', '--directory', action='store', dest='directory',
                    help='Directory of zone files to load in. Mutually '
                         'exclusive from -f/--file', metavar='<directory>',
                    default=None)
  parser.add_option('-f', '--file', action='store', dest='file',
                    help='Zone file to load in. Mutually exclusive from '
                         '-d/--directory.', metavar='<file>',
                    default=None)
  parser.add_option('-v', '--view', action='store', dest='view',
                    help='View to assign zone to. '
                    'If the view passed is any, the SOA record '
                    'will be added to every view that is associated '
                    'with the zone and the records will be assigned '
                    'to any. Otherwise the the SOA and the records '
                    'will be assigned to the view specified.',
                    metavar='<view>', default=None)
  parser.add_option('-u', '--username', action='store', dest='user_name',
                    help='Override default username.', metavar='<user_name>',
                    default=None)
  parser.add_option('-z', '--zone', action='store', dest='zone',
                    help='Zone to put records in.', metavar='<zone>',
                    default=None)

  (globals()["options"], args) = parser.parse_args(args)

  user = unicode(getpass.getuser())
  if( options.user_name ):
    user = unicode(options.user_name)

  if( options.config is None ):
    print "Must specify --config flag."
    parser.print_help()
    sys.exit(1)

  if( options.file is None and options.directory is None):
    print "Must specify --file or --directory flag."
    parser.print_help()
    sys.exit(1)

  if( options.file is not None and options.directory is not None):
    print "Must specify --file or --directory flag but not both."
    parser.print_help()
    sys.exit(1)

  if( options.view is None ):
    print "Must specify --view flag."
    parser.print_help()
    sys.exit(1)

  if( options.zone is None ):
    print "Must specify --zone flag."
    parser.print_help()
    sys.exit(1)

  records_view = options.view

  if( options.directory is not None ):
    zone_list = os.listdir(options.directory)
  else:
    zone_list = [options.file]
    
  total_record_count = 0
  for options.file in zone_list:
    if( options.directory is not None ):
      options.file = '%s/%s' % (options.directory, options.file)
    print 'Loading in %s' % options.file
    try:
      importer = zone_importer_lib.ZoneImport(options.file, 
                                              options.config,
                                              user, 
                                              unicode(options.view),
                                              unicode(options.zone))
    except errors.InvalidInputError as error:
      print error
      sys.exit(1)

    record_count = importer.MakeRecordsFromZone()
    print '%s records loaded from zone %s' % (record_count, options.file)

    total_record_count += record_count

  print '%s total records added' % total_record_count

if( __name__ == "__main__" ):
  main(sys.argv[1:])
  
